Chemistry 2005 Jamb Past Questions and Answers

Question 11 :

• JAMB 2005

What will happen if an aluminium spoon is used to stir a solution of iron (II) trioxonitrates (V)?

A. The spoon will be oxidized while the iron (II) ions will be reduced to the metal
B. The spoon will increase in size
C. The spoon will be reduced while the iron (II) ions will be oxidized
D. The spoon will be reduced

Question 12 :

• JAMB 2005

The enzymes responsible for converting sucrose into two simple isomeric sugars is

A. Maltase
B. Amylase
C. Invertase
D. Lactase

Question 13 :

• JAMB 2005

The decolourization of purple colour of tetraoxomanganate (VII) ion is a test for

A. Alkenes
B. Alkanols
C. Alkanals
D. Alkanes

Question 14 :

• JAMB 2005

Which of the following are structural isomers?

A. Propanoic acid and propan-1, 2-diol
B. Propanal and propanone
C. Ethanoic acid and propanoic acid
D. Ethan-1, 2-diol and ethanoic acid

Question 15 :

• JAMB 2005

In the purification of impure samples of ethyl ethanoate synthesized by esterification, concentrated sodium trioxocarbonate (IV) solution is used to remove

A. Water
B. Basic impurities
C. Acidic impurities
D. Ethoxyethane